CVE-2026-98168— smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，以下漏洞已得到修复： smb：客户端：修复 cifs_query_reparse_point() 中重解析缓冲区边界检查的问题 在 cifs_query_reparse_point() 函数中，对 start >= end 的检查仅在将指针转换为 struct reparse_data_buffer * 之前确保 start 指针位于响应数据范围内。但该检查未能验证剩余空间是否足够容纳该结构体固定长度的 8 字节头部。 如果服务器提供的 DataOffset 导致剩余空间少于 8 字节，上述
Possible ATT&CK Techniques 2 AI
T1210 · Exploitation of Remote Services T1059 · Command and Scripting InterpreterAffected Version Matrix 15
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 48ca7139ab7f0bbed95ff7a901ea497017769657< 3d67f155fe5813cfb02a551a9a12d6ea06a902e9 |
affected |
56e84c64fc257a95728ee73165456b025c48d408< d1152c96a3002e3df6b9a5b007cecaa7b19b4f79 |
affected | ||
56e84c64fc257a95728ee73165456b025c48d408< 8dc5db3a0e583ea8d31d0613cefd99e93e095c3c |
affected | ||
56e84c64fc257a95728ee73165456b025c48d408< 5f0306e731e2f46e91419eae57eee3a241c055e0 |
affected | ||
848d78e3625f15de09d34a562dc49a98b78a62f3 |
affected | ||
c13b779d26b3702fba8f7d5fe757aba5bda85fd0 |
affected | ||
6.12.34< 6.12.112 |
affected | ||
6.6.94< 6.7 |
affected | ||
| … +7 more rows | |||
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I. Basic Information for CVE-2026-98168
Vulnerability Information
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Vulnerability Title
smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
In cifs_query_reparse_point(), the start >= end check before casting to
struct reparse_data_buffer * only ensures the start pointer is within the
response. It fails to verify that there is enough space remaining for the
fixed 8-byte header of the structure.
If a server provides a DataOffset that leaves less than 8 bytes remaining,
the check passes, but subsequent reads of ReparseTag and ReparseDataLength
will occur out-of-bounds.
Fix this by ensuring the remaining space is at least the size of the
reparse_data_buffer structure before accessing its fields.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-98168
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-98168 (4)
Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total
| CVE-2026-98323 | 9.8 CRITICAL | RDMA/siw: Bound fragmented header copies by the remaining length |
| CVE-2026-98365 | 9.8 CRITICAL | RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access |
| CVE-2026-98282 | 8.8 HIGH | powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba |
| CVE-2026-98283 | 8.8 HIGH | KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid() |
| CVE-2026-98339 | 8.8 HIGH | wifi: cfg80211: don't filter by BSS type when removing stale entries |
| CVE-2026-98171 | 8.8 HIGH | smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs |
| CVE-2026-98261 | 8.1 HIGH | cifs: Fix server use-after-free in cifs_chan_skip_or_disable() |
| CVE-2026-98357 | 8.1 HIGH | IB/isert: wait for deferred control PDU completions before releasing the connection |
| CVE-2026-98239 | 8.1 HIGH | net: lan743x: fix RX checksum use-after-free |
| CVE-2026-98341 | 7.8 HIGH | wifi: cfg80211: don't free driver-owned scan requests |
| CVE-2026-98324 | 7.8 HIGH | dmaengine: pxa: fix double counting of the hw descriptors |
| CVE-2026-98228 | 7.8 HIGH | mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ |
| CVE-2026-98229 | 7.8 HIGH | xfrm: save input state data before secpath resets |
| CVE-2026-98320 | 7.8 HIGH | netfilter: flowtable: hold reference on ct until flow is released |
| CVE-2026-98318 | 7.8 HIGH | smb: client: validate absolute native symlink targets before NT fixups |
| CVE-2026-98315 | 7.8 HIGH | ntfs: protect runlist updates with the runlist lock |
| CVE-2026-98260 | 7.8 HIGH | exec: Cleanup POSIX timers right after de_thread() |
| CVE-2026-98256 | 7.8 HIGH | signal: Prevent exec() race |
| CVE-2026-98258 | 7.8 HIGH | posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list |
| CVE-2026-98254 | 7.8 HIGH | swiotlb: use the adjusted address for the highmem page lookup |
Showing top 20 of 208 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2026-98168
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